Re: Log Error ( ? )
- To: mathgroup at smc.vnet.net
- Subject: [mg78945] Re: [mg78883] Log Error ( ? )
- From: Murray Eisenberg <murray at math.umass.edu>
- Date: Fri, 13 Jul 2007 06:07:33 -0400 (EDT)
- Organization: Mathematics & Statistics, Univ. of Mass./Amherst
- References: <200707120911.FAA08031@smc.vnet.net>
- Reply-to: murray at math.umass.edu
Umm... Log[x-1]-2 = 0 is equivalent to x = 1+E^2, and N[1+E^2] gives 8.38906. Only "bug" is in your thinking the intercept should be 101. Larry wrote: > Hi, > > I had a question about something I found in Mathematica 5.2... I was plotting Log[x-1]-2 with x = {0,10} and y = {-10,5} and strangely found that the graph crossed the x-axes at approximately x == 8 ... > > It should be 101 of course, but it seemed like 8. Then I did an Nsolve with the equation set to 0, and low and behold got an answer x == 8.38906. > > Is this a bug in mathematica or am I missing something here? > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305
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